The opening timings for the Museum of Islamic Art during Ramadan are as follows:
Sunday to Wednesday -10am -2pm, Tuesday- closed, Thursday-10am – 2pm and 8pm-11pm, Friday-closed and Saturday-10am-2pm and 8pm-11pm.

got this from this link..

http://gulf-times.com/site/topics/article.asp?cu_no=2&item_no=378209&ver...